syzkaller login: [ 28.720409] BUG: Bad rss-counter state mm:0000000018dd7681 type:MM_FILEPAGES val:33 [ 28.722377] BUG: Bad rss-counter state mm:0000000018dd7681 type:MM_ANONPAGES val:22 [ 28.946394] ================================================================== [ 28.947574] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.948730] Read of size 8 at addr ffff88800d9df968 by task sshd/222 [ 28.949692] [ 28.949965] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.951047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.952275] Call Trace: [ 28.952671] [ 28.953025] dump_stack_lvl+0x91/0xf0 [ 28.953637] print_report+0xcc/0x620 [ 28.954226] ? __virt_addr_valid+0x102/0x340 [ 28.954932] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.955687] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.956454] kasan_report+0xbe/0xf0 [ 28.957044] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.957810] vma_interval_tree_remove+0xc75/0xec0 [ 28.958580] vma_prepare+0xc54/0x11a0 [ 28.959178] __split_vma+0x5af/0x950 [ 28.959765] ? __pfx___split_vma+0x10/0x10 [ 28.960423] ? find_held_lock+0x2c/0x110 [ 28.961061] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.961758] ? lock_is_held_type+0x9f/0x120 [ 28.962435] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.963180] ? mtree_range_walk+0x632/0x900 [ 28.963858] ? mas_walk+0x5c7/0x7c0 [ 28.964441] do_vmi_munmap+0x1f1/0x2b0 [ 28.965050] mmap_region+0x1f9/0x2660 [ 28.965644] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.966271] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.967184] ? __pfx_lock_acquire+0x10/0x10 [ 28.967844] ? __pfx_mmap_region+0x10/0x10 [ 28.968492] ? security_mmap_addr+0x7d/0xa0 [ 28.969144] ? get_unmapped_area+0x1f5/0x3f0 [ 28.969822] do_mmap+0x854/0xf00 [ 28.970376] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.970978] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.971671] ksys_mmap_pgoff+0x3af/0x500 [ 28.972297] do_syscall_64+0x3f/0x90 [ 28.972889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.973673] RIP: 0033:0x7f2c00ce5d82 [ 28.974242] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 28.976884] RSP: 002b:00007fffd31d9f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.977989] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c00ce5d82 [ 28.979039] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c0011f000 [ 28.980072] RBP: 00007f2c0011f000 R08: 0000000000000009 R09: 0000000000001000 [ 28.981109] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564e2b1dcd90 [ 28.982147] R13: 00007fffd31d9f20 R14: 00007fffd31d9f50 R15: 00007fffd31da2b0 [ 28.983202] [ 28.983564] [ 28.983823] Allocated by task 213: [ 28.984345] kasan_save_stack+0x22/0x50 [ 28.984964] kasan_set_track+0x25/0x30 [ 28.985566] __kasan_slab_alloc+0x59/0x70 [ 28.986202] kmem_cache_alloc+0x16b/0x370 [ 28.986856] vm_area_dup+0x20/0x160 [ 28.987416] __split_vma+0x170/0x950 [ 28.987990] split_vma+0xc6/0x110 [ 28.988535] mprotect_fixup+0x8d2/0xb30 [ 28.989139] do_mprotect_pkey+0x87e/0xd40 [ 28.989767] __x64_sys_mprotect+0x78/0xc0 [ 28.990405] do_syscall_64+0x3f/0x90 [ 28.990982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.991758] [ 28.992022] Freed by task 19: [ 28.992490] kasan_save_stack+0x22/0x50 [ 28.993100] kasan_set_track+0x25/0x30 [ 28.993732] kasan_save_free_info+0x2b/0x50 [ 28.994452] __kasan_slab_free+0x10a/0x190 [ 28.995108] kmem_cache_free+0x10d/0x4d0 [ 28.995629] rcu_core+0x8c8/0x2860 [ 28.996085] __do_softirq+0x1b7/0x7d4 [ 28.996613] [ 28.996840] Last potentially related work creation: [ 28.997435] kasan_save_stack+0x22/0x50 [ 28.997951] __kasan_record_aux_stack+0x8e/0xa0 [ 28.998551] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.999205] remove_vma+0x139/0x170 [ 28.999676] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.000279] do_vmi_munmap+0x1f1/0x2b0 [ 29.000785] __vm_munmap+0x138/0x3a0 [ 29.001257] __x64_sys_munmap+0x59/0x80 [ 29.001762] do_syscall_64+0x3f/0x90 [ 29.002242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.002919] [ 29.003142] The buggy address belongs to the object at ffff88800d9df910 [ 29.003142] which belongs to the cache vm_area_struct of size 168 [ 29.004654] The buggy address is located 88 bytes inside of [ 29.004654] freed 168-byte region [ffff88800d9df910, ffff88800d9df9b8) [ 29.006061] [ 29.006286] The buggy address belongs to the physical page: [ 29.006971] page:00000000c6b60d1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9df [ 29.008067] memcg:ffff888015d58601 [ 29.008537] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.009246] page_type: 0xffffffff() [ 29.009699] raw: 0100000000000200 ffff8880087a0c80 ffffea00002779c0 0000000000000009 [ 29.010642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015d58601 [ 29.011555] page dumped because: kasan: bad access detected [ 29.012230] [ 29.012466] Memory state around the buggy address: [ 29.013046] ffff88800d9df800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.013909] ffff88800d9df880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.014776] >ffff88800d9df900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.015624] ^ [ 29.016441] ffff88800d9df980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.017292] ffff88800d9dfa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.018138] ================================================================== [ 29.019454] Disabling lock debugging due to kernel taint [ 31.782911] BUG: Bad rss-counter state mm:00000000ab2fedbc type:MM_FILEPAGES val:33 [ 31.783979] BUG: Bad rss-counter state mm:00000000ab2fedbc type:MM_ANONPAGES val:22 [ 32.284435] BUG: Bad rss-counter state mm:000000001f823f01 type:MM_FILEPAGES val:33 [ 32.285381] BUG: Bad rss-counter state mm:000000001f823f01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5073' (ECDSA) to the list of known hosts. 2023/06/21 04:44:02 fuzzer started 2023/06/21 04:44:03 dialing manager at localhost:36067 2023/06/21 04:44:03 checking machine... 2023/06/21 04:44:03 checking revisions... [ 33.064353] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:44:03 testing simple program... [ 33.125761] cgroup: Unknown subsys name 'net' [ 33.188108] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fc971496e20 CR3=000000000e8cc000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2032303a34343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a34343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff1100d9e1324 RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806cf09910 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f13 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f633eb82900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffe3dbc9000 CR3=00000000090a0000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000